🔷 Toric IOL Astigmatism Correction Simulator

Removing the Cataractous Lens with Ultrasonic Phacoemulsification

Placeholder: the clouded lens is emulsified and removed through a small incision.

• ~2.2 mm: Incision size (Placeholder value)
• ~10 min: Procedure time (Placeholder value)
• Variable: Ultrasound energy (Placeholder value)
• Preserved: Capsular bag (Placeholder value)

Lens fragmentation and aspiration

Placeholder: phaco probe fragments the lens nucleus for safe aspiration.

Marking the Steep Corneal Meridian Before Implantation

Placeholder: preoperative markings define the target toric axis.

• Ink / digital: Marking method (Placeholder value)
• Limbal marks: Reference points (Placeholder value)
• Accounted for: Cyclotorsion check (Placeholder value)
• Upright, preop: Timing (Placeholder value)

Reference axis determination

Placeholder: the steep meridian is identified from preop keratometry/topography.

Rotating the Toric IOL into Precise Axis Alignment

Placeholder: lens axis markers are rotated to match the target meridian.

• <5° off-axis: Tolerance goal (Placeholder value)
• ~3.3% loss: Effect per degree (Placeholder value)
• Toric markers: Alignment aid (Placeholder value)
• Before check: Viscoelastic removal (Placeholder value)

Fine rotational adjustment

Placeholder: surgeon rotates the lens haptics until axis marks align.

Correcting Cataract and Astigmatism in One Procedure

Placeholder: spherical and cylindrical correction delivered simultaneously.

• IOL power: Sphere correction (Placeholder value)
• Toric power: Cylinder correction (Placeholder value)
• Single surgery: Combined benefit (Placeholder value)
• Near plano: Target refraction (Placeholder value)

Simultaneous power correction

Placeholder: toric IOL power neutralizes preop astigmatism at implantation.

Long-Term Rotational Stability and Visual Outcome

Placeholder: lens settles and outcome is assessed postoperatively.

• First weeks: Stability window (Placeholder value)
• Low if secure: Rotation risk (Placeholder value)
• Refraction/axis: Follow-up check (Placeholder value)
• Reduced: Spectacle need (Placeholder value)

Postoperative assessment

Placeholder: axis stability and residual astigmatism are verified.

Placeholder: accurate alignment maximizes spectacle independence.